IRS2573DSPBF

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IRS2573DSPBF is an integrated circuit with voltage and current mode controllers featured by Power Integrations. It is a highly integrated intelligent ballast controller specially designed for the buck or half-Bridge topology lighting application. It is the first device to incorporate a fully integrated, digital dimming controller for the buck topology line frequency lighting applications. Using DSP technology, the IRS2573DSPBF combines the controller and PFC in one device.

The application field of IRS2573DSPBF mainly covers commercial, industrial, and residential lighting applications, such as downlight, wall light, streetlight and etc. Its advanced digital dimming mode can dim down to 1% of total light levels for commercial lighting applications. The IRS2573DSPBF simplifies the design of fully integrated, digital AC/DC LED lighting solutions.

The working principle of the IRS2573DSPBF is complex. In the application of LED lighting, it employs an analog closed-loop controller to regulate the LED driver voltage. The current sense signal received by the optocoupler feedback is compared with the reference voltage and then adjusted with the duty cycle of the buck converter accordingly. It also adopts a digital pulse-width modulation (PWM) and pulse-noise coding to adjust the working duty cycle of the buck converter, which can achieve dimmable LED lighting with lower current ripples along with excellent EMI performance.

In summary, the IRS2573DSPBF is a highly integrated, intelligent ballast controller specially designed for LED lighting applications. It employs both analog and digital control techniques for optimal performance. It not only simplifies the system design, but also ensures a reliable dimmable LED lighting solution with lower current ripples and excellent EMI performance.

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